My Inquiry
My Account
onsemi 74LVX240MTCX
- Part No.:
- 74LVX240MTCX
- Manufacturer:
- onsemi
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVX240MTCX.pdf
- Description:
- IC BUFFER INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,139
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVX240MTCX from Fairchild Semiconductor is a low-voltage octal inverting buffer/line driver with dual 3-STATE outputs, designed for memory address and clock distribution in mixed-voltage systems. It operates from 2.0V to 3.6V VCC, accepts 5.5V-tolerant inputs, and delivers ±4mA drive capability at 3.3V with propagation delays as low as 4.3ns (CL = 15pF). It is used in 3.3V bus interface applications between 5V legacy logic and low-power embedded controllers.
For engineers reviewing the 74LVX240MTCX datasheet, pinout, applications, or equivalent options, key selection criteria include 5.5V input tolerance, dual independent 3-STATE enables (OE1/OE2), TSSOP-20 package compatibility, simultaneous switching noise performance, and guaranteed AC timing across −40°C to +85°C.
Technical Context
The 74LVX240MTCX implements two independent 4-bit inverting buffer groups (I0–I3/O0–O3 and I4–I7/O4–O7), each controlled by separate 3-STATE enable inputs OE1 and OE2. Its input structure supports voltage translation: 5V TTL/CMOS signals safely interface to 3.3V logic without level shifters.
It features guaranteed dynamic noise immunity (VOLP ≤ 0.8V, VOLV ≥ −0.8V at CL = 50pF) and tightly controlled output skew (tOSLH/tOSHL ≤ 1.5ns), enabling reliable high-density bus driving in noise-sensitive industrial control and communications backplanes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0V to 3.6V - Enables direct operation from 3.3V supply rails with margin for variation. |
| Input Voltage Range | 0V to 5.5V - Allows safe interfacing with 5V TTL/CMOS without external clamping or translation. |
| Output Drive | ±4mA at VCC = 3.3V - Sufficient to drive standard 50pF loads across temperature with defined VOL/VOL. |
| tPLH / tPHL | 4.3ns / 6.8ns (typ, CL = 15pF, VCC = 3.3V) - Supports >100MHz bus toggle rates in point-to-point configurations. |
| tPZL / tPLZ | 9.7ns / 11.4ns (max, CL = 50pF, VCC = 3.3V) - Ensures clean 3-STATE enable/disable timing for bus arbitration. |
| Simultaneous Switching Noise | VOLP ≤ 0.8V, VOLV ≥ −0.8V (CL = 50pF) - Meets stringent noise floor requirements for mixed-signal PCB layouts. |
| Operating Temperature | −40°C to +85°C - Qualified for industrial-grade embedded systems and telecom infrastructure. |
Pinout & Package
74LVX240MTCX is housed in a 20-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 4.4mm wide, with 0.65mm lead pitch and exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-Low 3-STATE enable inputs controlling first and second 4-bit buffer groups independently. |
| 2–5, 11–14 | I0–I3, I4–I7 | Inverting input terminals - HIGH input yields LOW output; compatible with 5V logic thresholds. |
| 6–9, 15–18 | O0–O3, O4–O7 | Inverting 3-STATE outputs - High-impedance when respective OE is HIGH. |
| 10 | GND | Ground reference for all I/O and internal circuitry. |
| 20 | VCC | Positive supply rail (2.0V–3.6V); decoupling capacitor required per layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| 5.5V-tolerant inputs | Enables direct connection to 5V microcontrollers or FPGAs without level-shifting components. |
| Dual independent 3-STATE controls | Allows selective isolation of two 4-bit data paths (e.g., address vs. data bus segments) with no shared enable timing constraints. |
| Guaranteed simultaneous switching noise limits | Validated dynamic VOLP/VOLV specs ensure signal integrity in high-pin-count, high-speed PCB routing. |
| Low quiescent current | ICC ≤ 40µA max at VCC = 3.6V - supports battery-backed or always-on subsystems with minimal standby power impact. |
| JEDEC MO-153 TSSOP footprint | Standardized 4.4mm body width enables drop-in replacement in space-constrained industrial modules and telecom line cards. |
Applications
| Memory Address Buffering | 3.3V/5V Bus Interface |
|---|---|
Use Scenario: Driving 3.3V SRAM or Flash address lines from a 5V microcontroller in legacy upgrade designs. IC Role / Device Role / Timing Role: Inverting buffer with 5.5V-tolerant inputs and 3.3V-compatible outputs; provides level translation and fanout gain. Use Value: Eliminates need for discrete level shifters while maintaining setup/hold timing margins due to sub-7ns propagation delay. |
Use Scenario: Isolating bidirectional data buses between 5V peripherals and 3.3V SoCs in industrial PLC backplanes. IC Role / Device Role / Timing Role: Dual-group 3-STATE line driver enabling directional control via OE1/OE2 for read/write arbitration. Use Value: Prevents bus contention with <12ns disable time and guarantees <1.5ns output skew across all eight drivers. |
| Clock Distribution | Noise-Sensitive Control Logic |
Use Scenario: Distributing a 3.3V system clock to multiple low-power peripherals while rejecting ground bounce. IC Role / Device Role / Timing Role: Low-skew inverting clock buffer with controlled edge rates and simultaneous switching noise suppression. Use Value: Meets VOLP ≤ 0.8V spec under full-load switching, preserving clock signal integrity in mixed-signal environments. |
Use Scenario: Driving reset, interrupt, or enable signals in medical monitoring units where EMI must be minimized. IC Role / Device Role / Timing Role: Low-noise, low-power inverting buffer with <40µA ICC and guaranteed dynamic VIHD/VILD thresholds. Use Value: Reduces radiated emissions through controlled output transitions and tight input threshold stability over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer with 3-STATE applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC240PW,118 (Nexperia) | Non-inverting inputs; 1.65V–3.6V VCC range; slightly faster tPLH (3.2ns typ @ 3.3V). | Requires logic inversion upstream if inverting function is mandatory; lacks 5.5V input tolerance. | Select when system uses only 3.3V logic and inverting is handled elsewhere; verify input voltage compatibility. |
| SN74LV240APWR (TI) | Same inverting function and 5.5V-tolerant inputs; wider VCC range (2.0V–5.5V); higher drive (±8mA). | Higher power consumption and larger TSSOP-20 footprint (4.4mm vs. TI's 4.4mm - same width but different lead form). | Prefer when operating above 3.6V or requiring stronger drive; confirm PCB land pattern compatibility with MTC20 outline. |
Compared with 74LVX240MTCX, the Nexperia part offers speed advantage but loses input voltage translation, while the TI part extends supply flexibility and drive strength at the cost of higher ICC and less optimized noise behavior - making 74LVX240MTCX optimal for strict 3.3V, low-noise, mixed-voltage bus buffering.
Availability
74LVX240MTCX is available at Aetrix Electronics and suitable for industrial control systems, telecom line card interfaces, and embedded memory expansion modules requiring stable component supply and long-term obsolescence management.
Supply support for 74LVX240MTCX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Fairchild Semiconductor was a U.S.-based analog and power IC manufacturer, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and telecom infrastructure.
The 74LVX240MTCX belongs to the LVX low-voltage CMOS logic family, engineered specifically for interoperability between 3.3V and 5V systems while minimizing power and noise in high-density PCB layouts.
FAQ
What is the maximum input voltage the 74LVX240MTCX can tolerate?
The 74LVX240MTCX supports DC input voltages up to 5.5V regardless of VCC level, enabling safe interfacing with 5V TTL or CMOS outputs. This specification is explicitly guaranteed in the Absolute Maximum Ratings and DC Electrical Characteristics tables of the Fairchild datasheet DS011609, and applies across the full operating temperature range of −40°C to +85°C. The 74LVX240MTCX achieves this via robust input protection diodes rated for ±20mA reverse current.
Does the 74LVX240MTCX support true 3.3V-only operation?
Yes, the 74LVX240MTCX is fully specified for 3.3V operation: its recommended VCC range is 2.0V to 3.6V, and all AC/DC parameters-including VOH ≥ 2.9V, VOL ≤ 0.44V, and tPLH ≤ 7.5ns-are guaranteed at VCC = 3.3V ± 0.3V. The 74LVX240MTCX draws only 40µA max ICC at 3.6V, confirming its suitability for low-power 3.3V systems without requiring 5V rails.
How are the two 3-STATE enable inputs (OE1 and OE2) assigned on the 74LVX240MTCX?
On the 74LVX240MTCX, OE1 (Pin 1) controls outputs O0–O3, and OE2 (Pin 19) controls outputs O4–O7. This dual-enable architecture allows independent gating of two 4-bit data paths-e.g., separating address and data bus segments-without requiring external logic. The 74LVX240MTCX truth table confirms that each OE asserts low to enable its associated group, with high impedance asserted when the respective OE is high.
What is the thermal and package specification for the 74LVX240MTCX?
74LVX240MTCX uses the MTC20 package: a 20-lead TSSOP per JEDEC MO-153, 4.4mm wide, 0.65mm lead pitch, with no thermal pad. Its absolute maximum junction temperature is 150°C, and it is rated for operation from −40°C to +85°C ambient. Power dissipation is limited to 180mW maximum, and the device exhibits 10pF typical input capacitance-critical for high-speed layout planning. The 74LVX240MTCX package drawing is documented on page 6 of DS011609.
Is the 74LVX240MTCX suitable for use in life support equipment?
No. Per Fairchild's Life Support Policy stated in DS011609, the 74LVX240MTCX is not authorized for use as a critical component in life support devices or systems-such as surgical implants or equipment whose failure could cause injury-without express written approval from ON Semiconductor (successor to Fairchild). The 74LVX240MTCX carries no medical-grade qualification, and its reliability data does not cover life-critical fault modes or extended lifetime validation.
74LVX240MTCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LVX
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 4mA, 4mA
- Voltage - Supply:
- 2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74LVX240MTCX FAQ
1.How can I place an order for 74LVX240MTCX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVX240MTCX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74LVX240MTCX reliable?
The price and inventory of 74LVX240MTCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX240MTCX is usually 5 days.
3.What payment methods are accepted for 74LVX240MTCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX240MTCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVX240MTCX?
74LVX240MTCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVX240MTCX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74LVX240MTCX?
For technical support, including 74LVX240MTCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX240MTCX requirements.
6.How does Aetrix verify that 74LVX240MTCX is sourced from the original manufacturer or authorized distributors?
All 74LVX240MTCX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74LVX240MTCX meets industry standards.
7.What is the process for return or replacement of 74LVX240MTCX?
All 74LVX240MTCX units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX240MTCX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74LVX240MTCX part is unused and in its original packaging.
Return procedure for 74LVX240MTCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVX240MTCX Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
